;=----------------------------------------------------------------------------=; ; OS on Kaleid ; ; ; ; Desc: Multiboot useful functions ; ; (x86_64 architecture only) ; ; ; ; ; ; Copyright © 2018-2020 The OS/K Team ; ; ; ; This file is part of OS/K. ; ; ; ; OS/K is free software: you can redistribute it and/or modify ; ; it under the terms of the GNU General Public License as published by ; ; the Free Software Foundation, either version 3 of the License, or ; ; (at your option) any later version. ; ; ; ; OS/K is distributed in the hope that it will be useful, ; ; but WITHOUT ANY WARRANTY; without even the implied warranty of ; ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ; ; GNU General Public License for more details. ; ; ; ; You should have received a copy of the GNU General Public License ; ; along with OS/K. If not, see . ; ;=----------------------------------------------------------------------------=; ; ---------------------------------------------------------------------------- ; ; Multiboot check function to ensure we are launch by GRUB ; ; ---------------------------------------------------------------------------- ; MB_check: cmp ecx, MB_GRUB_MAGIC ; The magic number must be in ecx jne .no_MB ret .no_MB: mov ax, "01" ; ERROR 01 : No multiboot jmp Error